The 9K35 STRELA-10 surface-to-air missile system is intended to defend troops from enemy air attacks in all sorts of combat activities. Its NATO code name is SA-13 GOPHER. The MT-LB light armoured tracked vehicle provides the entire system with excellent cross-country capabilities. The SA-13 GOPHER [ZRK-BD Strela-10] is a short-range, low altitude SAM system. The SA-13 missile (9M37) is 2 2 m long, 012mm diameter with a 0 4 m wmgspan and has a maximum speed of Mach 2 It carries a 5 kg HE warhead. The estimated minimum range of the SA-13 is 500 meters and the maximum effective range of 5000 meters with altitude engagement limits of 10 to 3500 meters. The SA-13 is a modified MT-LB amphibious armored tracked vehicle with the machine-gun turret removed. The launcher pedestal mounted to the rear of center of the vehicle is 360° traversable It incorporates the operators position behind a large, rectangular window at its base Normally the TELAR carries four ready to fire SA-13 missile container-launchers and eight reloads in the cargo compartment but it can also carry either SA-9 GASKIN container-launcher boxes in their place or a mixture of the two. This enables the cheaper SA-9 (Strela-1) to be used against the easier targets and the more expensive and sophisticated SA-13 (Strela-10) against the difficult targets. The missile mix also allows a choice of infra-red (IR) seeker types on the missiles for use against extremely low altitude targets and in adverse weather.